I think I’ve found it. Could you open up Luma3DS settings and make sure that Enable loading external firms and modules
and Enable game patching
is disabled?
Once your 3DS has booted up, power it off again and re-enable those settings and the PNID should be unlinked (you should be able to tell if you see 022-5432 when opening up something like Miiverse).
Then, follow our usual troubleshooting tips for 022-5432:
- Open Nimbus
- Switch to Nintendo servers
- Open eShop (if user has an NNID)
- Exit eShop (if user has an NNID)
- Open Nimbus
- Switch to Pretendo servers
Once you’re back on Pretendo servers, you should get 015-5015 and that confirms your PNID is definitely unlinked. You can then link a new one in settings.